On Fri, May 30, 2014 at 10:25:40AM -0400, Alan Stern wrote:
> On Fri, 30 May 2014, Huang Rui wrote:
>
>
> Ugh, don't make a copy of the existing code. Use the facilities the
> way they are meant to be used. Like the patch below.
>
Looks good to me, thank you to improve it. Will you send this format
patch later or I would update it as you refined?
Thanks,
Rui
>
>
>
> Index: usb-3.15/drivers/usb/misc/usbtest.c
> ===================================================================
> --- usb-3.15.orig/drivers/usb/misc/usbtest.c
> +++ usb-3.15/drivers/usb/misc/usbtest.c
> @@ -7,7 +7,7 @@
> #include <linux/moduleparam.h>
> #include <linux/scatterlist.h>
> #include <linux/mutex.h>
> -
> +#include <linux/timer.h>
> #include <linux/usb.h>
>
> #define SIMPLE_IO_TIMEOUT 10000 /* in milliseconds */
> @@ -484,6 +484,13 @@ alloc_sglist(int nents, int max, int var
> return sg;
> }
>
> +static void sg_timeout(unsigned long _req)
> +{
> + struct usb_sg_request *req = (struct usb_sg_request *) _req;
> +
> + usb_sg_cancel(req);
> +}
> +
> static int perform_sglist(
> struct usbtest_dev *tdev,
> unsigned iterations,
> @@ -495,6 +502,9 @@ static int perform_sglist(
> {
> struct usb_device *udev = testdev_to_usbdev(tdev);
> int retval = 0;
> + struct timer_list sg_timer;
> +
> + setup_timer_on_stack(&sg_timer, sg_timeout, (unsigned long) req);
>
> while (retval == 0 && iterations-- > 0) {
> retval = usb_sg_init(req, udev, pipe,
> @@ -505,7 +515,10 @@ static int perform_sglist(
>
> if (retval)
> break;
> + mod_timer(&sg_timer, jiffies +
> + msecs_to_jiffies(SIMPLE_IO_TIMEOUT));
> usb_sg_wait(req);
> + del_timer_sync(&sg_timer);
> retval = req->status;
>
> /* FIXME check resulting data pattern */
>
>
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